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Phys Rev Lett. 2004 Nov 19;93(21):216601. Epub 2004 Nov 16.

Photocurrent generation in polymer-fullerene bulk heterojunctions.

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  • 1Molecular Electronics, Materials Science CentrePlus, University of Groningen, Nijenborgh 4, NL-9747 AG Groningen, The Netherlands.

Abstract

The photocurrent in conjugated polymer-fullerene blends is dominated by the dissociation efficiency of bound electron-hole pairs at the donor-acceptor interface. A model based on Onsager's theory of geminate charge recombination explains the observed field and temperature dependence of the photocurrent in PPV:PCBM blends. At room temperature only 60% of the generated bound electron-hole pairs are dissociated and contribute to the short-circuit current, which is a major loss mechanism in photovoltaic devices based on this material system.

PMID:
15601044
DOI:
10.1103/PhysRevLett.93.216601
[PubMed]
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